Aviation aftermarket MRO (Maintenance, Repair and Overhaul) is a value-added service that accompanies the delivery of new aircraft. While aftermarket plays a crucial role in the aviation industry, it doesn't receive the enthusiastic headlines that often accompany new aircraft. 

Aerospace manufacturing is a high-technology industry that produces "aircraft, guided missiles, space vehicles, aircraft engines, propulsion units, and related parts". Most of the industry is geared toward governmental work.

aerospace industry, assemblage of manufacturing concerns that deal with vehicular flight within and beyond Earth’s atmosphere. (The term aerospace is derived from the words aeronautics and spaceflight.) The aerospace industry is engaged in the research, development, and manufacture of flight vehicles, including unpowered gliders and sailplanes (see gliding), uncrewed aerial vehicles (UAVs), lighter-than-air craft (see balloon; airship), heavier-than-air craft (both fixed-wing and rotary-wing; see airplane; military aircraft), missiles (see rocket and missile system), space launch vehicles, and spacecraft (crewed and uncrewed). Also included among its concerns are major flight-vehicle subsystems such as propulsion and avionics (aviation electronics) and key support systems necessary for the testing, operation, and maintenance of flight vehicles. In addition, the industry is engaged in the fabrication of non-aerospace products and systems that make use of aerospace technology.

Aerospace technology broadly encompasses any machine that flies. Whether the flight stays within Earth's atmosphere or leaves Earth's field of gravity for suborbital, orbital, or even deep space flights, all of the craft and the systems that power, control, and drive them are products of aerospace engineering.